Experimental simulation of downburst-like outflows and the associated dynamic properties of a self-supported transmission tower

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-10 DOI:10.1016/j.jweia.2025.106032

Yongli Zhong , Eric Savory , Yichen Liu , Zhitao Yan , Yan Li , Qike Wei

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引用次数: 0

Abstract

This paper focuses on the replication of a downburst outflow with the plane wall jet approach and reports on the response of an aero-elastic model of a self-supported tower subjected to that outflow. The stationary and non-stationary wall jet flow is studied through velocity measurements at various elevations and downstream distances. The results indicate that the normalized mean velocity profiles from the current steady flow tests have a good agreement with the empirical models of the vertical profile for downbursts. The influence of the Reynolds number (Re) on the decay weakens when Re > 30,000. A rotating-gate device can generate the primary characteristics of the non-stationary downburst-like wind. The power spectral density of the residual turbulence from the generated non-stationary wind is consistent with the synoptic wind. The full-scale downburst recorded from the Andrews Air Force Base is used as the target event to verify the experimental procedure. The aero-elastic testing results show that the resonance contribution can reach more than 60% of the total fluctuating response of tower. There is no clear trend for the displacement and acceleration response with the change of downstream distance of the tower.

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自支撑式输电塔下爆型射流及相关动力特性的实验模拟

本文重点研究了用平面壁面射流方法模拟下突流，并报道了自持塔在下突流作用下的气动弹性模型的响应。通过在不同海拔高度和下游距离上的速度测量，研究了静止和非静止壁面射流。结果表明，目前稳定流试验的归一化平均速度剖面与下爆垂向剖面经验模型吻合较好。雷诺数Re对衰变的影响减弱，Re >；30000年。旋转闸门装置可以产生非静止下突风的主要特征。产生的非平稳风产生的残余湍流的功率谱密度与天气风一致。从安德鲁斯空军基地记录的全尺寸下爆被用作目标事件来验证实验过程。气动弹性试验结果表明，共振对塔体总波动响应的贡献可达60%以上。位移和加速度响应随塔身下游距离的变化趋势不明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.